199 lines
6.0 KiB
Ruby
199 lines
6.0 KiB
Ruby
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# Copyright 2010 Google Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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require 'addressable/uri'
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require 'google/inflection'
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require 'google/api_client/discovery/resource'
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require 'google/api_client/discovery/method'
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module Google
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class APIClient
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##
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# A service that has been described by a discovery document.
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class API
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##
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# Creates a description of a particular version of a service.
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#
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# @param [String] api
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# The identifier for the service. Note that while this frequently
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# matches the first segment of all of the service's RPC names, this
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# should not be assumed. There is no requirement that these match.
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# @param [String] version
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# The identifier for the service version.
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# @param [Hash] api_description
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# The section of the discovery document that applies to this service
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# version.
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#
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# @return [Google::APIClient::API] The constructed service object.
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def initialize(document_base, discovery_document)
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@document_base = Addressable::URI.parse(document_base)
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@discovery_document = discovery_document
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metaclass = (class <<self; self; end)
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self.resources.each do |resource|
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method_name = Google::INFLECTOR.underscore(resource.name).to_sym
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if !self.respond_to?(method_name)
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metaclass.send(:define_method, method_name) { resource }
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end
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end
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self.methods.each do |method|
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method_name = Google::INFLECTOR.underscore(method.name).to_sym
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if !self.respond_to?(method_name)
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metaclass.send(:define_method, method_name) { method }
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end
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end
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end
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##
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# Returns the id of the service.
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#
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# @return [String] The service id.
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def id
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return @discovery_document['id']
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end
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##
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# Returns the identifier for the service.
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#
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# @return [String] The service identifier.
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def name
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return @discovery_document['name']
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end
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##
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# Returns the version of the service.
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#
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# @return [String] The service version.
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def version
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return @discovery_document['version']
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end
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##
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# Returns the parsed section of the discovery document that applies to
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# this version of the service.
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#
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# @return [Hash] The service description.
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def description
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return @discovery_document['description']
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end
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##
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# Returns true if this is the preferred version of this API.
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#
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# @return [TrueClass, FalseClass]
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# Whether or not this is the preferred version of this API.
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def preferred
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return @discovery_document['preferred']
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end
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##
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# Returns the base URI for the discovery document.
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#
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# @return [Addressable::URI] The base URI.
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attr_reader :document_base
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##
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# Returns the base URI for this version of the service.
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#
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# @return [Addressable::URI] The base URI that methods are joined to.
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def method_base
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if @discovery_document['basePath']
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return @method_base ||= (
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self.document_base +
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Addressable::URI.parse(@discovery_document['basePath'])
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).normalize
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else
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return nil
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end
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end
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##
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# Updates the hierarchy of resources and methods with the new base.
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#
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# @param [Addressable::URI, #to_str, String] new_base
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# The new base URI to use for the service.
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def method_base=(new_method_base)
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@method_base = Addressable::URI.parse(new_method_base)
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self.resources.each do |resource|
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resource.method_base = @method_base
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end
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self.methods.each do |method|
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method.method_base = @method_base
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end
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end
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##
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# A list of resources available at the root level of this version of the
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# service.
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#
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# @return [Array] A list of {Google::APIClient::Resource} objects.
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def resources
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return @resources ||= (
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(@discovery_document['resources'] || []).inject([]) do |accu, (k, v)|
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accu << Google::APIClient::Resource.new(self.method_base, k, v)
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accu
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end
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)
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end
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##
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# A list of methods available at the root level of this version of the
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# service.
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#
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# @return [Array] A list of {Google::APIClient::Method} objects.
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def methods
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return @methods ||= (
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(@discovery_document['methods'] || []).inject([]) do |accu, (k, v)|
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accu << Google::APIClient::Method.new(self.method_base, k, v)
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accu
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end
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)
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end
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##
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# Converts the service to a flat mapping of RPC names and method objects.
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#
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# @return [Hash] All methods available on the service.
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#
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# @example
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# # Discover available methods
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# method_names = client.discovered_api('buzz').to_h.keys
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def to_h
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return @hash ||= (begin
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methods_hash = {}
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self.methods.each do |method|
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methods_hash[method.id] = method
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end
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self.resources.each do |resource|
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methods_hash.merge!(resource.to_h)
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end
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methods_hash
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end)
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end
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##
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# Returns a <code>String</code> representation of the service's state.
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#
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# @return [String] The service's state, as a <code>String</code>.
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def inspect
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sprintf(
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"#<%s:%#0x ID:%s>", self.class.to_s, self.object_id, self.id
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)
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end
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end
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end
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end
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